河南农业科学 ›› 2020, Vol. 49 ›› Issue (4): 120-123.DOI: 10.15933/j.cnki.1004-3268.2020.04.017

• 园艺 • 上一篇    下一篇

干旱荒漠区早酥和红早酥梨夏季光合作用日变化规律研究

韩多红1,2,周德峰3,孟好军4
  

  1. (1.河西学院 生命科学与工程学院,甘肃 张掖 734000;2.甘肃省河西走廊特色资源利用省级重点实验室,甘肃 张掖 734000;3.甘州区石岗墩天然植被管护站,甘肃 张掖 734000;4.甘肃省祁连山水源涵养林研究院,甘肃 张掖 734000)
  • 收稿日期:2019-12-10 出版日期:2020-04-15 发布日期:2020-04-15
  • 作者简介:韩多红(1977-),男,甘肃张掖人,副教授,主要从事经济林研究。E-mail:handuohong@163.com
  • 基金资助:
    甘肃省林业和草原科技计划项目(2019kj028)

Diurnal Variation of Photosynthesis of Zaosu and Hongzaosu Pears in Summer in Arid Desert Area

HAN Duohong1,2,ZHOU Defeng3,MENG Haojun4   

  1. (1.College of Life Sciences and Engineering,Hexi University,Zhangye 734000,China;2.Key Provincial Laboratory in Gansu Province for Characteristic Resources Utility in Hexi Corridor,Zhangye 734000,China;3.Shigangdun Natural Vegetation Management and Protection Station in Ganzhou District,Zhangye 734000,China;4.Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province,Zhangye 734000,China)
  • Received:2019-12-10 Published:2020-04-15 Online:2020-04-15

摘要: 为了解河西走廊早酥和红早酥梨光合作用日变化的差异,利用LI-6400XT便携式光合作用测定系统对其光合特性日变化进行测定。结果表明,早酥和红早酥梨的净光合速率(Pn)日变化均为双峰型曲线,早酥的Pn均值为5.07 μmol/(m2·s),大于红早酥的Pn均值[4.91 μmol/(m2·s)];早酥和红早酥梨的蒸腾速率(Tr)日变化为双峰曲线,早酥的Tr小于红早酥梨;早酥和红早酥梨均存在光合“午休”现象,原因主要为气孔限制因素。早酥和红早酥梨的日均水分利用效率(WUE)差异不大,分别为2.05、2.02 μmol/mmol,气孔导度(Gs)的日变化趋势呈相同规律。

关键词: 干旱荒漠区, 早酥梨, 红早酥梨, 光合作用, 日变化

Abstract: In order to understand the diurnal variation of photosynthetic characteristics of Zaosu and Hongzaosu pears, the diurnal variation of photosynthetic characteristics was measured by LI-6400XT portable photosynthetic measurement system. The results showed that the diurnal changes of the net photosynthetic rate(Pn) of Zaosu,Hongzaosu pears were both double-peak curve,and the mean of the Pn of Zaosu was 5.07 μmol/(m2·s),which was larger than that of Hongzaosu,4.91 μmol/ (m2·s).The diurnal variation of the Tr of Zaosu and Hongzaosu pears was a double-peak curve,and the Tr of Zaosu pear was smaller than that of Hongzaosu pear.Zaosu and Hongzaosu pears had photosynthetic “ siesta”phenomenon,and the main reason was stomatal restriction.There was little difference in WUE between Zaosu and Hongzaosu pears(2.05,2.02 μmol/mmol respectively),and the diurnal variation trend of Gs was the same.

Key words: Arid desert area, Zaosu pear, Hongzaosu pear, Photosynthesis, Diurnal variation

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